Getting Request body content using Retrofit 2.0 POST method

I have got it working from this linkRetrofit2: Modifying request body in OkHttp Interceptor

private String bodyToString(final RequestBody request) {            try {                final RequestBody copy = request;                final Buffer buffer = new Buffer();                if (copy != null)                    copy.writeTo(buffer);                else                    return "";                return buffer.readUtf8();            } catch (final IOException e) {                return "did not work";            }        }

Retrofit dependencies i am using are

 compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta3'    compile 'com.squareup.okhttp3:okhttp:3.0.0-RC1'    compile 'com.squareup.okhttp3:logging-interceptor:3.0.0-RC1'    compile 'com.squareup.retrofit2:retrofit:2.0.0-beta3'

I too had the similar issue, I had set JSON as @Body type in retrofit, so the namevaluepair appears in front of the raw body, and it can be seen inside the interceptor.Even though if we log/debug the jsonObject.toString we see the request as correct without the namevaluepair presented.

What i had done was by setting

Call<ResponseBody> getResults(@Body JsonObject variable);

and in the calling of the method i converted the JSONObject to JsonObject by

 new JsonParser().parse(model).getAsJsonObject();